Table 3.

Effects of heat stress on serum enzymatic activity and liver redox status of broilers.

Group	ALT (U/L)	AST (U/L)	MDA (nmol/mgprot)	SOD (U/mgprot)
Control 1	2.43 ± 0.15	198.68 ± 10.72	0.64 ± 0.13	128.56 ± 6.17
HS1	2.62 ± 0.29	237.83 ± 10.90⁎⁎	0.97 ± 0.09⁎⁎	142.38 ± 5.87*
Control 2	2.58 ± 0.24	218.57 ± 10.94	0.71 ± 0.12	112.73 ± 2.37
HS2	2.61 ± 0.26	252.57 ± 16.56##	0.83 ± 0.04	104.53 ± 8.55

Serum ALT and AST levels were measured by IFCC rate method. Liver MDA and SOD level were measured in broilers.

^⁎P < 0.05,

^⁎⁎P < 0.01 vs. control 1.

^##P < 0.01 vs. control 2.